<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div id="app">{{msg}}</div>
</body>
<script src="../js/vue.js"></script>
<script>
    Vue.config.productionTip = false;
    new Vue({
        el:"#app",
        data:{
           msg:"message from data"
        },

        mounted(){
            // console.log(this.$root === this) //根实例
            // console.log(this.$el) //挂载节点
            // console.log(this.$options)//vue的配置项
            // console.log(this.$data.msg)//vue的配置项中的data数据
        }
    })
</script>
</html>